Road Sprinkler Fitters Local Union 669 is currently the largest Building Trades Local Union in the United Association. Our total membership, which includes retirees, journeymen and apprentices, is over 11,000. Road Sprinkler Fitters 669 is a nationwide local union. This gives the members of Local 669 the flexibility to work in almost any part of the United States they would like to seek employment. The career of the Sprinkler Fitter can provide a range of opportunities for achievement. Once an apprentice successfully completes the apprenticeship program and becomes a Journeyman, many opportunities lie ahead. You can work as a foreman or move up to superintendent with a company. Being identified as a Sprinkler Fitter is both rewarding and fulfilling. The Officers and Business Agents are elected from the Membership by the Membership.